Trying to find out overhead of new Adaptive Query Optimization feature

use perf to find out process cpu usage ( eg:perf stat -e task-clock -p 9576 sleep 5 )

to disable adaptive features I used

alter system set optimizer_features_enable='11.2.0.1';

so the result is:

	3000 hpares	3000 hpares	3000 hpares	3000 hpares	3000 hpares	avg
adaptive off	1724,46	1786,04	1696,22	1687,89	1690,89	1717,10
adaptive on	1803,79	1815,98	1966,07	1804,35	1819,35	1841,91
overhead	4,40	1,65	13,73	6,45	7,06	6,78

ps: lotshparses.sql link